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JP2009054501A - Quartz bulb for double-ended discharge lamp - Google Patents

Quartz bulb for double-ended discharge lamp Download PDF

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JP2009054501A
JP2009054501A JP2007221978A JP2007221978A JP2009054501A JP 2009054501 A JP2009054501 A JP 2009054501A JP 2007221978 A JP2007221978 A JP 2007221978A JP 2007221978 A JP2007221978 A JP 2007221978A JP 2009054501 A JP2009054501 A JP 2009054501A
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Prior art keywords
quartz
tube
quartz tube
sealing
bulb
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JP2007221978A
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JP4941181B2 (en
Inventor
Akira Ogawara
亮 大河原
Shiyouji Yamamoto
本 将 二 山
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Iwasaki Electric Co Ltd
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Iwasaki Electric Co Ltd
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Priority to JP2007221978A priority Critical patent/JP4941181B2/en
Application filed by Iwasaki Electric Co Ltd filed Critical Iwasaki Electric Co Ltd
Priority to DE602008006739T priority patent/DE602008006739D1/en
Priority to EP08764689A priority patent/EP2184764B8/en
Priority to US12/675,409 priority patent/US20100219752A1/en
Priority to CN200880104728A priority patent/CN101796610A/en
Priority to PCT/JP2008/059656 priority patent/WO2009028243A1/en
Priority to AT08764689T priority patent/ATE508470T1/en
Priority to CA2696871A priority patent/CA2696871A1/en
Publication of JP2009054501A publication Critical patent/JP2009054501A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/38—Exhausting, degassing, filling, or cleaning vessels
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • H01J61/302—Vessels; Containers characterised by the material of the vessel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/84—Lamps with discharge constricted by high pressure
    • H01J61/86—Lamps with discharge constricted by high pressure with discharge additionally constricted by close spacing of electrodes, e.g. for optical projection
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
    • H01J9/245—Manufacture or joining of vessels, leading-in conductors or bases specially adapted for gas discharge tubes or lamps
    • H01J9/247—Manufacture or joining of vessels, leading-in conductors or bases specially adapted for gas discharge tubes or lamps specially adapted for gas-discharge lamps
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
    • H01J9/26—Sealing together parts of vessels
    • H01J9/265—Sealing together parts of vessels specially adapted for gas-discharge tubes or lamps
    • H01J9/266—Sealing together parts of vessels specially adapted for gas-discharge tubes or lamps specially adapted for gas-discharge lamps

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)

Abstract

【課題】
高純度石英で石英バルブを形成する場合と同等のランプ特性やランプ寿命を維持したまま、製造コストを低減する。
【解決手段】
長手方向両端側に形成される一対の直管部（２Ａ、２Ｂ）の間に発光部となるチャンバ（３）が形成され、直管部（２Ａ、２Ｂ）は、チャンバ（３）側の部分が電極マウント（Ｍ）を挿入した状態で封止される封止管（４Ａ、４Ｂ）に形成されると共に、先端側が封止管（４Ａ、４Ｂ）の封止後に切断除去される給排気管（５Ａ、５Ｂ）に形成され、封止管（４Ａ、４Ｂ）を気密封止したときに少なくともチャンバ内面（３ａ）を形成する部分を全て含む石英管中央部（１Ｃ）と、給排気管（５Ａ、５Ｂ）の全部又は一部を含む石英管端部（１Ａ，１Ｂ）とが連続して形成されると共に、一方又は双方の石英管端部（１Ａ，１Ｂ）を、石英管中央部（１Ｃ）より低純度の石英で形成した。
【選択図】図１
【Task】
The manufacturing cost is reduced while maintaining the same lamp characteristics and lamp life as when the quartz bulb is made of high-purity quartz.
[Solution]
A chamber (3) serving as a light emitting portion is formed between a pair of straight pipe portions (2A, 2B) formed on both ends in the longitudinal direction, and the straight pipe portions (2A, 2B) are portions on the chamber (3) side. Is formed in the sealing pipe (4A, 4B) sealed with the electrode mount (M) inserted, and the supply / exhaust pipe whose tip side is cut and removed after sealing the sealing pipe (4A, 4B) (5A, 5B), and a quartz tube central part (1C) including at least a part forming the chamber inner surface (3a) when the sealing pipes (4A, 4B) are hermetically sealed; 5A, 5B) including all or part of the quartz tube end (1A, 1B) is continuously formed, and one or both of the quartz tube ends (1A, 1B) are connected to the quartz tube center ( 1C) made of quartz of lower purity.
[Selection] Figure 1

Description

本発明は、中間に発光部となるチャンバが形成された石英管の両端側に、封止管と給排気管とを連通して成る直管部が形成されたダブルエンド型放電ランプ用石英バルブに関する。   The present invention relates to a quartz bulb for a double-end type discharge lamp in which a straight tube portion formed by communicating a sealing tube and an air supply / exhaust tube is formed on both ends of a quartz tube in which a chamber serving as a light emitting portion is formed in the middle. About.

現在自動車用の前照灯やプロジェクタ用のバックライトなど一般的に使用されているダブルエンド型の高圧放電ランプは、放電管の肉厚分布が不均一であると、高温、高圧での動作中に破裂に至るおそれが生ずるため、発光部に排気管残部（チップ）のない肉厚分布が均一な石英バルブを用いており、その石英バルブにはチップが形成されないことからチップレスランプとも称されている。   Currently used double-ended high-pressure discharge lamps, such as automotive headlamps and projector backlights, are operating at high temperatures and pressures if the thickness distribution of the discharge tube is uneven. In this case, a quartz bulb with a uniform wall thickness distribution with no exhaust pipe remainder (chip) is used in the light emitting part, and the chip is not formed on the quartz bulb. ing.

このダブルエンド型放電ランプ用石英バルブ５１は、例えば図６（ａ）に示すように、一本の石英管の長手方向両端側に形成される一対の直管部５２Ａ、５２Ｂの間に発光部となるチャンバ５３が形成されている。
前記直管部５２Ａ、５２Ｂは、チャンバ５３側の部分が電極マウントＭを挿入した状態でチャンバ５３を気密封止する封止管５４Ａ、５４Ｂに形成され、開口端側の部分が封止管５４Ａ、５４Ｂの封止後に切断除去される給排気管５５Ａ、５５Ｂに形成されており、封止前はチャンバ５３の余剰ガス及び封入ガスの給排気流路として機能する。 For example, as shown in FIG. 6A, the double-end type discharge lamp quartz bulb 51 includes a light emitting portion between a pair of straight tube portions 52A and 52B formed on both ends in the longitudinal direction of one quartz tube. A chamber 53 is formed.
The straight pipe portions 52A and 52B are formed in sealing tubes 54A and 54B that hermetically seal the chamber 53 in a state where the electrode mount M is inserted in the portion on the chamber 53 side, and the portion on the opening end side is the sealing tube 54A. , 54B is cut and removed after sealing, and functions as a supply / exhaust flow path for surplus gas and sealed gas in the chamber 53 before sealing.

そして、ランプ製造時は、石英バルブ５１の一方の直管部５２Ｂの先端を予め閉じておき、図６（ｂ）に示すように、他方の直管部５２Ａの開口端を上に向けた状態で、リード線５６の先端側にモリブデン箔５７を介してタングステン電極５８を溶接した前記電極マウントＭを挿入した後、給排気管５５Ａを真空ポンプ（図示せず）に接続して、石英バルブ５１内部の空気を導出し、アルゴンガスなどの不活性ガスを充填する。
次いで、図６（ｃ）に示すように給排気管５５Ａの上端開口部をバーナ５９により仮封止した後、図６（ｄ）に示すようにバーナ５９を下から上へ移動させながら封止管５４Ａを加熱すると、図６（ｅ）に示すように一方の電極マウントＭが気密封止される。 When the lamp is manufactured, the front end of one straight tube portion 52B of the quartz bulb 51 is closed in advance, and the open end of the other straight tube portion 52A faces upward as shown in FIG. 6B. Then, after inserting the electrode mount M in which the tungsten electrode 58 is welded via the molybdenum foil 57 into the leading end side of the lead wire 56, the supply / exhaust pipe 55A is connected to a vacuum pump (not shown), and the quartz bulb 51 is connected. The internal air is led out and filled with an inert gas such as argon gas.
Next, as shown in FIG. 6 (c), the upper end opening of the air supply / exhaust pipe 55A is temporarily sealed by the burner 59, and then sealed while moving the burner 59 from the bottom to the top as shown in FIG. 6 (d). When the tube 54A is heated, one electrode mount M is hermetically sealed as shown in FIG.

次いで、上下を反転させて、図６（ｆ）に示すように直管部５２Ｂの先端を開口させ、上方から他方の電極マウンド５２を挿入して、図６（ｂ）〜（ｄ）と同様の工程を繰り返し行うと、図６（ｇ）に示すようにチャンバ５３内に一対の電極５８を対向配設させた状態で石英バルブ５１両端の各封止管５４Ａ，５４Ｂが気密封止される。   Next, the top and bottom are turned upside down to open the front end of the straight pipe portion 52B as shown in FIG. 6 (f), and the other electrode mound 52 is inserted from above, as in FIGS. 6 (b) to 6 (d). When this process is repeated, the sealing tubes 54A and 54B at both ends of the quartz bulb 51 are hermetically sealed with a pair of electrodes 58 disposed oppositely in the chamber 53 as shown in FIG. 6 (g). .

そして最後に、図６（ｈ）に示すように、各封止管５４Ａ，５４Ｂからリード線５７を露出させるようにして、これに連通する給排気管５５Ａ、５５Ｂを切断除去すれば、高圧放電ランプＬが完成する。
特許第３６５３１９５号公報 Finally, as shown in FIG. 6 (h), if the lead wire 57 is exposed from the sealing tubes 54A and 54B and the supply / exhaust tubes 55A and 55B communicating therewith are cut and removed, a high-pressure discharge is obtained. The lamp L is completed.
Japanese Patent No. 3653195

このように、石英バルブ５１は、チャンバ５３の両側に封止管５４Ａ、５４Ｂが形成されているだけでは足りず、さらに、電極マウントＭを石英バルブ内に支持させたり、チャンバ内部を真空にしたり不活性ガスを供給するために、封止管５４Ａ、５４Ｂに連通する給排気管５５Ａ、５５Ｂ部分が必要となり、その長さは、最終的に製品となる放電ランプより非常に長い。   Thus, it is not necessary for the quartz bulb 51 to have the sealing tubes 54A and 54B formed on both sides of the chamber 53. Furthermore, the electrode mount M is supported in the quartz bulb, or the inside of the chamber is evacuated. In order to supply the inert gas, the portions of the air supply / exhaust pipes 55A and 55B communicating with the sealing pipes 54A and 54B are required, and the length thereof is much longer than that of the discharge lamp that is finally the product.

一方、近年プロジェクタ用のバックライトとして使用される高圧放電ランプは、例えば内容積８０ｍｍ３に対し１６.５ｍｇの水銀を封入し（約０．２０５ｍｇ／ｍｍ３）、ランプ電力１２５Ｗで点灯しており、従来の一般照明用の水銀ランプと比較して極めて小さなランプに高い密度の水銀を封入し、高い管壁負荷にて点灯している。
特許第３２１６８７７号公報 On the other hand, the high-pressure discharge lamp used as a backlight in recent years for projector, for example, the internal volume 80 mm 3 to mercury sealed in 16.5 mg (about 0.205mg / mm 3), which illuminates the lamp power 125W Compared with conventional mercury lamps for general lighting, mercury with a high density is enclosed in a very small lamp, and the lamp is lit with a high load on the tube.
Japanese Patent No. 3216877

このように高い管壁負荷にて点灯することにより高い効率を得ているが、高温・高圧にて動作させているため、電極材や石英材に含まれる不純ガス及び不純物がランプ寿命に大きな影響を与える。
このため、ランプの高効率化を達成すると共に、長い寿命を得るために、高純度の電極材を使用するだけでなく、石英バルブに高純度の石英が使用されるようになってきているが、このような高純度の石英は、従来の石英に比して格段に高価になっている。 Although high efficiency is obtained by lighting at such a high tube wall load, since it is operated at high temperature and high pressure, impure gas and impurities contained in the electrode material and quartz material have a large effect on the lamp life. give.
For this reason, in order to achieve high efficiency of the lamp and to obtain a long lifetime, not only high-purity electrode materials are used but also high-purity quartz is being used for the quartz bulb. Such high-purity quartz is much more expensive than conventional quartz.

特に、上述したようなチップレスランプを製造する場合、その両端部を切断する関係上、石英バルブは実際のランプより十分に長く形成しておかなければ成らず、最終的には切り取り捨てられてしまう部分にも極めて高価な純度の高い石英管を使用しなければならないため材料費が嵩むという問題があった。   In particular, when manufacturing a chipless lamp as described above, the quartz bulb must be formed sufficiently longer than the actual lamp due to the fact that both ends thereof are cut. There is a problem in that the material cost increases because it is necessary to use an extremely expensive high-purity quartz tube in the portion where the material is to be removed.

そこで本発明は、高純度石英で石英バルブを形成する場合に比して、同等のランプ特性及びランプ寿命を有し、且つ、材料費を低減できるようにすることを技術的課題としている。   Therefore, the present invention has a technical problem to have a lamp characteristic and a lamp life equivalent to those of the case where the quartz bulb is formed of high-purity quartz, and to reduce the material cost.

この課題を解決するために、本発明は、石英管の長手方向両端側に形成される一対の直管部の間に発光部となるチャンバが形成され、前記直管部は、チャンバ側の部分が電極マウントを挿入した状態でチャンバを気密封止する封止管に形成されると共に、先端側の部分が封止管の封止後に切断除去される給排気管に形成されたダブルエンド型放電ランプ用石英バルブにおいて、
前記封止管を気密封止したときに少なくともチャンバ内面を形成する部分を全て含む石英管中央部と、前記給排気管の全部又は一部を含む石英管端部とが連続して形成されると共に、一方又は双方の石英管端部が、石英管中央部より低純度の石英で形成されたことを特徴としている。 In order to solve this problem, according to the present invention, a chamber serving as a light emitting portion is formed between a pair of straight tube portions formed on both ends in the longitudinal direction of a quartz tube, and the straight tube portion is a portion on the chamber side. Is formed in a sealed tube that hermetically seals the chamber with the electrode mount inserted, and a double-ended discharge formed in the supply / exhaust tube in which the tip side portion is cut and removed after sealing the sealed tube In quartz bulbs for lamps,
When the sealing tube is hermetically sealed, a quartz tube central portion including at least a portion forming the chamber inner surface and a quartz tube end portion including all or a part of the air supply / exhaust tube are continuously formed. In addition, one or both ends of the quartz tube are formed of quartz having a purity lower than that of the center portion of the quartz tube.

本発明によれば、純度が異なる二種類の石英を用いて、チャンバ内面を形成する部分を全て含む石英管中央部を高純度石英で形成され、その両側に連続される石英管端部が低純度石英で形成される。
石英管端部は、切断除去される給排気管の全部または少なくともその一部を含み、その部分が材料費の安い低純度石英で形成されるので、その分製造コストが低減される。
この場合に、チャンバ内面を構成する石英管中央部は高純度の石英で形成されるので、点灯中の高温により石英に含まれる不純物が発光空間内に析出したり、早期に発光部内面の石英管に白濁（失透）が発生したりすることがなく、高純度石英のみを用いて発光管を形成した場合と全く同様のランプ特性を有するだけでなく、ランプ寿命に関しても同様に長寿命化を満足することができる。 According to the present invention, using two types of quartz of different purity, the quartz tube central portion including all the portions forming the chamber inner surface is formed of high purity quartz, and the quartz tube ends continuous on both sides thereof are low. Made of pure quartz.
The end portion of the quartz tube includes all or at least a portion of the air supply / exhaust tube to be cut and removed, and the portion is formed of low-purity quartz having a low material cost, so that the manufacturing cost is reduced accordingly.
In this case, since the central portion of the quartz tube constituting the inner surface of the chamber is formed of high-purity quartz, impurities contained in the quartz are precipitated in the light emitting space due to the high temperature during lighting, or the quartz on the inner surface of the light emitting portion is early. There is no white turbidity (devitrification) in the tube, and it not only has the same lamp characteristics as when the arc tube is formed using only high-purity quartz, but also the lamp life is extended. Can be satisfied.

本例では、高純度石英で石英バルブを形成する場合に比して、同等のランプ特性やランプ寿命を維持したまま、製造コストを低減できるようにするという目的を達成するため、
石英管の長手方向両端側に形成される一対の直管部の間に発光部となるチャンバが形成され、前記直管部は、チャンバ側の部分が電極マウントを挿入した状態でチャンバを気密封止する封止管に形成されると共に、先端側の部分が封止管の封止後に切断除去される給排気管に形成されたダブルエンド型放電ランプ用石英バルブにおいて、
前記封止管を気密封止したときに少なくともチャンバ内面を形成する部分を全て含む石英管中央部と、前記給排気管の全部又は一部を含む石英管端部とが連続して形成されると共に、一方又は双方の石英管端部を、石英管中央部より低純度の石英で形成した。 In this example, in order to achieve the purpose of reducing the manufacturing cost while maintaining the same lamp characteristics and lamp life as compared with the case where the quartz bulb is formed of high-purity quartz,
A chamber serving as a light emitting portion is formed between a pair of straight tube portions formed on both ends in the longitudinal direction of the quartz tube. The straight tube portion is hermetically sealed with an electrode mount inserted in the chamber side portion. In the double-ended discharge lamp quartz bulb formed in the supply / exhaust tube, which is formed in the sealing tube to be stopped and the tip side portion is cut and removed after sealing of the sealing tube,
When the sealing tube is hermetically sealed, a quartz tube central portion including at least a portion forming the chamber inner surface and a quartz tube end portion including all or a part of the air supply / exhaust tube are continuously formed. At the same time, one or both ends of the quartz tube were made of quartz having a purity lower than that of the center portion of the quartz tube.

以下、本発明を図面に示す実施例に基づいて説明する。
図１は本発明に係るダブルエンド型放電用石英バルブの一例を示す説明図、図２は電極マウントを封着した状態を示す説明図、図３は給排気管を切断した状態を示す説明図、図４〜５は他の実施形態を示す説明図である。 Hereinafter, the present invention will be described based on embodiments shown in the drawings.
FIG. 1 is an explanatory view showing an example of a double-ended discharge quartz bulb according to the present invention, FIG. 2 is an explanatory view showing a state where an electrode mount is sealed, and FIG. 3 is an explanatory view showing a state where an air supply / exhaust pipe is cut off. 4-5 is explanatory drawing which shows other embodiment.

図１に示すダブルエンド型放電ランプ用石英バルブ１は、石英管の長手方向両端側に形成される一対の直管部２Ａ、２Ｂの間に発光部となるチャンバ３が形成されている。
直管部２Ａ、２Ｂは、チャンバ３側の部分が電極マウントＭを挿入した状態でチャンバを気密封止する封止管４Ａ、４Ｂに形成されると共に、先端側の部分が封止管４Ａ、４Ｂの封止後に切断除去される給排気管５Ａ、５Ｂに形成されている。
なお、給排気管５Ａ、５Ｂは、ランプ製造時において真空ポンプなどの排気系（図示せず）及び封入ガス供給系（図示せず）に接続され、封止前にはチャンバ３の余剰ガスの排気流路及び封入ガスの給気流路として機能する。 In the quartz bulb 1 for a double-ended discharge lamp shown in FIG. 1, a chamber 3 serving as a light emitting portion is formed between a pair of straight tube portions 2A and 2B formed on both ends in the longitudinal direction of the quartz tube.
The straight pipe portions 2A and 2B are formed in sealing tubes 4A and 4B that hermetically seal the chamber in a state where the electrode mount M is inserted in the chamber 3 side portion, and the tip side portion is the sealing tube 4A and It is formed in the supply / exhaust pipes 5A and 5B which are cut and removed after the sealing of 4B.
The supply / exhaust pipes 5A and 5B are connected to an exhaust system (not shown) such as a vacuum pump and an enclosed gas supply system (not shown) at the time of lamp manufacture, and the excess gas in the chamber 3 is sealed before sealing. It functions as an exhaust passage and a supply passage for an enclosed gas.

また、石英バルブ１は、封止管４Ａ、４Ｂを気密封止したときに少なくともチャンバ内面３ａを形成する部分を全て含む石英管中央部１Ｃと、その両側に連続して形成される直管部先端側の石英管端部１Ａ及び１Ｂの３ピース構造となっており、双方の石英管端部１Ａ及び１Ｂが石英管中央部１Ｃより低純度の石英で形成されている。
石英管中央部１Ｃの長さは、必要に応じて、図１（ａ）に示すようにチャンバ３及び封止管４Ａ、４Ｂを合わせた長さより短くしたり、図１（ｂ）に示すように等しくしたり、図１（ｃ）に示すように長くしたり、任意に選択可能である。
石英管中央部１Ｃの長さがチャンバ３及び封止管４Ａ、４Ｂを合わせた長さ以下であれば、給排気管５Ａ、５Ｂの全部が石英管端部１Ａ及び１Ｂに含まれ、チャンバ３及び封止管４Ａ、４Ｂを合わせた長さより長ければ、給排気管５Ａ、５Ｂの一部が石英管端部１Ａ及び１Ｂとなる。 The quartz bulb 1 includes a quartz tube central portion 1C including at least a portion forming the chamber inner surface 3a when the sealing tubes 4A and 4B are hermetically sealed, and a straight tube portion continuously formed on both sides thereof. The quartz tube end portions 1A and 1B on the front end side have a three-piece structure, and both the quartz tube end portions 1A and 1B are made of quartz having a lower purity than the quartz tube center portion 1C.
The length of the central portion 1C of the quartz tube is made shorter than the combined length of the chamber 3 and the sealing tubes 4A and 4B as shown in FIG. 1 (a) or as shown in FIG. 1 (b). Or can be arbitrarily selected, for example, as shown in FIG.
If the length of the central portion 1C of the quartz tube is equal to or shorter than the total length of the chamber 3 and the sealing tubes 4A, 4B, all of the air supply / exhaust tubes 5A, 5B are included in the quartz tube end portions 1A and 1B. And if it is longer than the total length of the sealing tubes 4A, 4B, a part of the air supply / exhaust tubes 5A, 5B becomes the quartz tube end portions 1A, 1B.

例えば、石英バルブ１の全長＝２８０ｍｍ、チャンバ３及び封止管４Ａ、４Ｂを合わせたランプ長さ＝８０ｍｍ、封止後に切断除去される給排気管５Ａ、５Ｂの長さが１００ｍｍに設計されている場合に、図１（ａ）に示す石英バルブ１は、石英管中央部１Ｃの長さ＝約２０ｍｍ、石英管端部１Ａ及び１Ｂの長さ＝１３０ｍｍ、図１（ｂ）に示す石英バルブ１は、石英管中央部１Ｃの長さ＝約８０ｍｍ、石英管端部１Ａ及び１Ｂの長さ＝１００ｍｍ、図１（ｃ）に示す石英バルブ１は、石英管中央部１Ｃの長さ＝約１６０ｍｍ、石英管端部１Ａ及び１Ｂの長さ＝６０ｍｍである。   For example, the total length of the quartz bulb 1 is 280 mm, the combined lamp length of the chamber 3 and the sealing tubes 4A and 4B is 80 mm, and the lengths of the supply and exhaust tubes 5A and 5B cut and removed after sealing are 100 mm. 1A, the quartz bulb 1 shown in FIG. 1A has a quartz tube central portion 1C length = about 20 mm, quartz tube end portions 1A and 1B length = 130 mm, and the quartz bulb shown in FIG. 1 is the length of the quartz tube central portion 1C = about 80 mm, the lengths of the quartz tube end portions 1A and 1B = 100 mm, and the quartz bulb 1 shown in FIG. 160 mm, and the length of the quartz tube ends 1A and 1B = 60 mm.

この石英バルブ１を製造する際は、石英管中央部１Ｃとなる部分に内径２ｍｍ、外径６ｍｍ、所定長さの高純度石英管（例えばフィリップス社製ＰＨ３７０等）が用いられ、その両端の石英管端部１Ａ及び１Ｂとなる部分には、石英純度が低く石英管中央部１Ｃと内外径が等しい所定長さの一般ランプ用石英管（フィリップス社製ＰＨ３００等）が用いられ、これらを融着して一本の石英管を形成する。
次いで、この石英管を成形用モールドにセットし、チャンバ３となる部分を加熱しながら内圧を加えることにより、この部分を外径１０ｍｍ、内径４ｍｍの概略回転楕円状に膨らませることで発光部となるチャンバ３が形成される。
これにより、石英管中央部１Ｃの長さに応じて、切断除去される給排気管５Ａ，５Ｂの全部又は一部が低純度石英で形成されることとなる。 When the quartz bulb 1 is manufactured, a high-purity quartz tube (for example, PH370 manufactured by Philips) having an inner diameter of 2 mm, an outer diameter of 6 mm, and a predetermined length is used in a portion that becomes the central portion 1C of the quartz tube, and quartz at both ends thereof. As the tube end portions 1A and 1B, a quartz tube for a general lamp (PH300 manufactured by Philips Co., Ltd.) having a low quartz purity and a length equal to that of the central portion 1C of the quartz tube is used. Thus, a single quartz tube is formed.
Next, the quartz tube is set in a molding mold, and an internal pressure is applied while heating the portion that becomes the chamber 3, so that the portion is expanded into a substantially rotating ellipse having an outer diameter of 10 mm and an inner diameter of 4 mm. A chamber 3 is formed.
Thus, all or part of the air supply / exhaust pipes 5A and 5B to be cut and removed is formed of low-purity quartz in accordance with the length of the central part 1C of the quartz pipe.

以上が本発明の一構成例であって、次にその作用について、ダブルエンド型放電ランプの製造工程に基づき説明する。なお、図６と重複する工程についてはその詳細説明を省略する。
まず、図１（ａ）〜（ｃ）に示すように石英バルブ１の直管部２Ｂの下端を熱加工などにより予め塞いでおき、上方に向けられた他方の直間部２Ａの開口端から、リード線６の先端側にモリブデン箔７を介してタングステン電極８が溶接された電極マウントＭを挿入し、図６（ｂ）〜（ｄ）と同様の手順で封止管５Ａを封着した後、石英バルブ１を上下反転させて図６（ｂ）〜（ｄ）と同様の手順で反対側の直管部５Ｂに電極マウントＭを封着する（図２（ａ）〜（ｃ）参照）。 The above is one configuration example of the present invention, and the operation thereof will be described based on the manufacturing process of the double-end type discharge lamp. Detailed description of the same steps as those in FIG. 6 will be omitted.
First, as shown in FIGS. 1A to 1C, the lower end of the straight tube portion 2B of the quartz bulb 1 is closed in advance by thermal processing or the like, and from the open end of the other straight portion 2A directed upward. The electrode mount M to which the tungsten electrode 8 is welded via the molybdenum foil 7 is inserted into the leading end side of the lead wire 6, and the sealing tube 5A is sealed in the same procedure as in FIGS. Thereafter, the quartz bulb 1 is turned upside down, and the electrode mount M is sealed to the opposite straight pipe portion 5B in the same procedure as in FIGS. 6B to 6D (see FIGS. 2A to 2C). ).

このように一対の電極マウントＭの封着が完了した後、図３（ａ）〜（ｃ）に示すように、各封止管４Ａ，４Ｂからリード線７の先端を露出させて、これに連続する給排気管５Ａ、５Ｂを切断除去すればダブルエンド型放電ランプＬが完成する。
切断された給排気管５Ａ及び５Ｂは、その全部又は一部が低純度石英で成形されているので、当該部分全てを高純度石英で成形した場合に比して製造コストが軽減される。 After the sealing of the pair of electrode mounts M is completed in this way, as shown in FIGS. 3A to 3C, the leading end of the lead wire 7 is exposed from each of the sealing tubes 4A and 4B. If the continuous supply / exhaust pipes 5A and 5B are cut and removed, the double-end type discharge lamp L is completed.
Since all or a part of the cut supply / exhaust pipes 5A and 5B is formed of low-purity quartz, the manufacturing cost is reduced as compared with the case where all of the parts are formed of high-purity quartz.

図４はさらに他の実施例を示す。なお、図１と重複する部分は同一符号を付して詳細説明を省略する。
本例のダブルエンド型放電ランプ用石英バルブ１１は、図４（ａ）〜（ｃ）に示すように、石英管中央部１１Ｃ及び一方の石英管端部１１ＢからなるメインピースＰ１と、他方の石英管端部１１ＡからなるサブピースＰ２の２ピース構造となっている点で実施例１と相違する。
そして、メインピースＰ１が高純度石英で成形され、サブピースＰ２が低純度石英で成形されている。
なお、メインピースＰ１の長さは、必要に応じて、図４（ａ）に示すようにチャンバ３及び一方の封止管４Ｂを合わせた長さより短くしたり、図４（ｂ）に示すように等しくしたり、図４（ｃ）に示すように長くしたり、任意に選択可能である。 FIG. 4 shows still another embodiment. The same parts as those in FIG.
Double ended discharge lamp quartz bulb 11 of the present embodiment, as shown in FIG. 4 (a) ~ (c) , the main piece P 1 of quartz tube central portion 11C and one of the quartz tube end 11B, the other The second embodiment is different from the first embodiment in that it has a two-piece structure of a sub-piece P2 composed of a quartz tube end 11A.
The main piece P 1 is formed in high purity quartz, sub-pieces P 2 is formed by low-purity quartz.
The length of the main piece P 1 represents optionally or shorter than the chamber 3 and the combined length of one of the sealing tube 4B shown in FIG. 4 (a), FIG. 4 (b) It is possible to make them equal to each other, to make them longer as shown in FIG.

この石英バルブ１１を用いて放電ランプを製造した場合、切断除去される給排気管５Ａ及び５Ｂのうち、一方の給排気管５Ａの全部又は一部を低純度石英で形成することができるので、当該部分を全て高純度石英で成形する場合に比して材料費が軽減され、ひいては、製造コストを軽減することができる。   When a discharge lamp is manufactured using this quartz bulb 11, all or part of one of the supply / exhaust pipes 5A among the supply / exhaust pipes 5A and 5B to be cut and removed can be formed of low-purity quartz. Compared with the case where all the parts are made of high-purity quartz, the material cost is reduced, and as a result, the manufacturing cost can be reduced.

図５はさらに他の実施例を示し、本例のダブルエンド型放電ランプ用石英バルブ２１は、封止管４Ａ及び４Ｂの封止後に切断除去される給排気管５Ａ，５Ｂの肉厚を薄く形成することにより、低純度石英の廃棄量をも減少させ、材料費の低減化を図ろうとするものである。
図５（ａ）〜（ｃ）の上段は、石英管中央部２１Ｃの長さがチャンバ３及び封止管４Ａ、４Ｂを合わせた長さより短く形成され、石英管端部２１Ａ（２１Ｂ）は、封止管４Ａ（４Ｂ）部分の外径が太く、給排気管５Ａ（２５Ｂ）部分が細く形成されている。
図５（ａ）〜（ｃ）の下段は、石英管中央部２１Ｃの長さがチャンバ３及び封止管４Ａ、４Ｂを合わせた長さに等しく形成され、給排気管５Ｂ（５Ａ）となる石英管端部２１Ｂ（２１Ａ）は、石英管中央部２１Ｃの封止管４Ｂ（４Ａ）部分に比して細く形成されている。 FIG. 5 shows still another embodiment. In the quartz bulb 21 for a double-end type discharge lamp of this example, the thickness of the supply / exhaust pipes 5A and 5B cut and removed after sealing the sealing pipes 4A and 4B is reduced. By forming, the amount of low-purity quartz is also reduced, and the material cost is reduced.
5A to 5C, the length of the quartz tube center portion 21C is shorter than the combined length of the chamber 3 and the sealing tubes 4A and 4B, and the quartz tube end portion 21A (21B) The outer diameter of the sealing tube 4A (4B) is thick, and the supply / exhaust tube 5A (25B) is thin.
In the lower part of FIGS. 5A to 5C, the length of the central portion 21C of the quartz tube is formed to be equal to the combined length of the chamber 3 and the sealing tubes 4A and 4B, and becomes the supply / exhaust tube 5B (5A). The quartz tube end 21B (21A) is formed thinner than the sealing tube 4B (4A) portion of the quartz tube central portion 21C.

この石英バルブ２１を用いて放電ランプを製造する場合、まず、図５（ａ）に示すように石英バルブ２１の直管部２Ｂの下端を熱加工などにより予め塞いでおき、上方に向けられた他方の直間部２Ａの開口端から、リード線６の先端側にモリブデン箔７を介してタングステン電極８が溶接された電極マウントＭを挿入し、図６（ｂ）〜（ｄ）と同様の手順で封止管５Ａを封着した後、石英バルブ１を上下反転させて図６（ｂ）〜（ｄ）と同様の手順で反対側の封止管５Ｂに電極マウントＭを封着する（図５（ｂ）参照）。   When manufacturing a discharge lamp using this quartz bulb 21, first, the lower end of the straight tube portion 2B of the quartz bulb 21 is closed in advance by thermal processing or the like as shown in FIG. An electrode mount M in which a tungsten electrode 8 is welded via a molybdenum foil 7 is inserted into the leading end side of the lead wire 6 from the opening end of the other direct portion 2A, and the same as in FIGS. 6B to 6D. After sealing the sealing tube 5A in the procedure, the quartz bulb 1 is turned upside down, and the electrode mount M is sealed in the sealing tube 5B on the opposite side in the same procedure as in FIGS. (Refer FIG.5 (b)).

そして最後に、このように一対の電極マウントＭの封着が完了した後、図５（ｃ）に示すように、各封止管４Ａ，４Ｂからリード線７の先端を露出させて、これに連続する給排気管５Ａ、５Ｂを切断除去すればダブルエンド型放電ランプＬが完成する。
切断される給排気管５Ａ及び５Ｂは、その全部又は一部が低純度石英で形成されているだけでなく、封止管４Ａ及び４Ｂに比して細く形成されているので、石英の使用量が少なくて済み、また、産業廃棄物として廃棄する石英の量も減少させることができるので、したがって、その分の材料費が軽減され、ひいては、製造コストを軽減することができる。
また、同様に図１において石英管端部１Ａ及び１Ｂの肉厚を薄くすることによっても同様以上の効果が得られる。 Finally, after the sealing of the pair of electrode mounts M is completed in this way, as shown in FIG. 5 (c), the tip of the lead wire 7 is exposed from each of the sealing tubes 4A and 4B. If the continuous supply / exhaust pipes 5A and 5B are cut and removed, the double-end type discharge lamp L is completed.
The supply / exhaust pipes 5A and 5B to be cut are not only entirely or partly formed of low-purity quartz, but are also thinner than the sealing pipes 4A and 4B. Therefore, the amount of quartz to be discarded as industrial waste can be reduced, so that the material cost can be reduced and the manufacturing cost can be reduced accordingly.
Similarly, the same effect can be obtained by reducing the thickness of the quartz tube end portions 1A and 1B in FIG.

さらに、上記実施例１〜３のいずれの場合も、チャンバ内面を構成する石英管中央部１Ｃは高純度石英で形成されるので、点灯中の高温により石英に含まれる不純物が発光空間内に析出したり、早期に発光部内面の石英管に白濁（失透）が発生したりすることがなく、高純度石英のみを用いて発光管を形成した場合と全く同様のランプ特性を有するだけでなく、ランプ寿命に関しても同様に長寿命化を満足することができる。   Further, in any of the first to third embodiments, the quartz tube central portion 1C constituting the inner surface of the chamber is formed of high-purity quartz, so that impurities contained in the quartz are precipitated in the light emitting space due to a high temperature during lighting. And the turbidity (devitrification) does not occur in the quartz tube on the inner surface of the light emitting part at an early stage, and it has not only the same lamp characteristics as when the arc tube is formed using only high-purity quartz. As for the lamp life, it is possible to satisfy the longer life as well.

以上述べたように、本発明は、チップレスタイプのダブルエンド型放電ランプを製造する際に用いる石英バルブの用途に適用することができる。   As described above, the present invention can be applied to the use of a quartz bulb used when manufacturing a chipless type double-ended discharge lamp.

本発明に係るダブルエンド型放電ランプ用石英バルブの一例を示す説明図。Explanatory drawing which shows an example of the quartz bulb for double end type discharge lamps concerning this invention. 電極マウントを封着した状態を示す説明図。Explanatory drawing which shows the state which sealed the electrode mount. 給排気管を切断した状態を示す説明図。Explanatory drawing which shows the state which cut | disconnected the air supply / exhaust pipe. 他の実施形態を示す説明図。Explanatory drawing which shows other embodiment. 他の実施形態を示す説明図。Explanatory drawing which shows other embodiment. 従来の石英バルブ及びこれを用いた放電ランプの組立工程を示す説明図。Explanatory drawing which shows the assembly process of the conventional quartz bulb and a discharge lamp using the same.

符号の説明Explanation of symbols

１、１１、２１ ダブルエンド型放電ランプ用石英バルブ
１Ａ、１１Ａ、２１Ａ 石英管端部
１Ｂ、１１Ｂ、２１Ｂ 石英管端部
１Ｃ、１１Ｃ、２１Ｃ 石英管中央部
２Ａ、２Ｂ 直管部
３ チャンバ
３ａ チャンバ内面
Ｍ 電極マウント
４Ａ、４Ｂ 封止管
５Ａ、５Ｂ 給排気管
Ｌ ダブルエンド型放電ランプ
1, 11, 21 Quartz bulb 1A, 11A, 21A quartz tube end for double end type discharge lamp
1B, 11B, 21B quartz tube end
1C, 11C, 21C Quartz tube central portion 2A, 2B Straight tube portion 3 Chamber 3a Chamber inner surface M Electrode mount 4A, 4B Sealing tube 5A, 5B Supply / exhaust tube L Double-end discharge lamp

Claims (3)

石英管の長手方向両端側に形成される一対の直管部の間に発光部となるチャンバが形成され、前記直管部は、チャンバ側の部分が電極マウントを挿入した状態でチャンバを気密封止する封止管に形成されると共に、先端側の部分が封止管の封止後に切断除去される給排気管に形成されたダブルエンド型放電ランプ用石英バルブにおいて、
前記封止管を気密封止したときに少なくともチャンバ内面を形成する部分を全て含む石英管中央部と、前記給排気管の全部又は一部を含む石英管端部とが連続して形成されると共に、一方又は双方の石英管端部が、石英管中央部より低純度の石英で形成されたことを特徴とするダブルエンド型放電ランプ用石英バルブ。 A chamber serving as a light emitting portion is formed between a pair of straight tube portions formed on both ends in the longitudinal direction of the quartz tube. The straight tube portion is hermetically sealed with an electrode mount inserted in the chamber side portion. In the double-ended discharge lamp quartz bulb formed in the supply / exhaust tube, which is formed in the sealing tube to be stopped and the tip side portion is cut and removed after sealing of the sealing tube,
When the sealing tube is hermetically sealed, a quartz tube central portion including at least a portion forming the chamber inner surface and a quartz tube end portion including all or a part of the air supply / exhaust tube are continuously formed. In addition, a quartz bulb for a double-ended discharge lamp, wherein one or both quartz tube ends are formed of quartz having a lower purity than the quartz tube central portion. 前記石英管は、一方の石英管端部と、石英管中央部及び他方の石英管端部を一体成形した部分の２ピースで形成され、一方の石英管端部が石英管中央部を含む部分より低純度の石英で形成された請求項１記載のダブルエンド型放電ランプ用石英バルブ。   The quartz tube is formed of two pieces, that is, one quartz tube end portion, a quartz tube center portion, and a portion in which the other quartz tube end portion is integrally formed, and one quartz tube end portion includes the quartz tube center portion. 2. The quartz bulb for a double-ended discharge lamp according to claim 1, wherein the quartz bulb is made of quartz of lower purity. 前記石英管が、石英管中央部と、その両側に形成される直管部先端側の石英管端部の３ピースで形成され、双方の石英管端部が、石英管中央部より低純度の石英で形成された請求項１記載のダブルエンド型放電ランプ用石英バルブ。

The quartz tube is formed of three pieces: a quartz tube central portion and a quartz tube end portion on the front end side of the straight tube portion formed on both sides thereof, and both quartz tube end portions are of lower purity than the quartz tube central portion. 2. A quartz bulb for a double-ended discharge lamp according to claim 1, wherein the quartz bulb is made of quartz.

JP2007221978A 2007-08-29 2007-08-29 Quartz bulb for double-ended discharge lamp Expired - Fee Related JP4941181B2 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
JP2007221978A JP4941181B2 (en) 2007-08-29 2007-08-29 Quartz bulb for double-ended discharge lamp
EP08764689A EP2184764B8 (en) 2007-08-29 2008-05-26 Quartz arc tube for double ended discharge lamp
US12/675,409 US20100219752A1 (en) 2007-08-29 2008-05-26 Quartz bulb for double ended discharge lamp
CN200880104728A CN101796610A (en) 2007-08-29 2008-05-26 Quartz valve for double ended discharge lamp
DE602008006739T DE602008006739D1 (en) 2007-08-29 2008-05-26 QUARTZ VESSEL FOR A DOUBLE DISCHARGE LAMP
PCT/JP2008/059656 WO2009028243A1 (en) 2007-08-29 2008-05-26 Quartz valve for double ended discharge lamp
AT08764689T ATE508470T1 (en) 2007-08-29 2008-05-26 QUARTZ VESSEL FOR A DOUBLE-END DISCHARGE LAMP
CA2696871A CA2696871A1 (en) 2007-08-29 2008-05-26 Quartz bulb for double ended discharge lamp

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JPH06187944A (en) * 1992-12-17 1994-07-08 Matsushita Electric Ind Co Ltd High-pressure discharge lamp arc tube
JPH0855605A (en) * 1994-08-11 1996-02-27 Matsushita Electron Corp Metal halide lamp
JPH08315776A (en) * 1995-02-14 1996-11-29 General Electric Co <Ge> Multilayer coating film in metal halide lamp
JP3653195B2 (en) * 1999-06-25 2005-05-25 株式会社小糸製作所 Manufacturing method of arc tube for discharge lamp apparatus and arc tube
JP2004247297A (en) * 2003-01-24 2004-09-02 Matsushita Electric Ind Co Ltd Method for manufacturing high-pressure discharge lamp, glass tube for high-pressure discharge lamp, and lamp member for high-pressure discharge lamp

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JP4941181B2 (en) 2012-05-30
EP2184764B1 (en) 2011-05-04
EP2184764B8 (en) 2011-09-14
CN101796610A (en) 2010-08-04
WO2009028243A1 (en) 2009-03-05
EP2184764A4 (en) 2010-09-29
CA2696871A1 (en) 2009-03-05
US20100219752A1 (en) 2010-09-02
ATE508470T1 (en) 2011-05-15
EP2184764A1 (en) 2010-05-12

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